郑州某悬臂施工连续梁桥预应力优化简

以郑州某跨南水北调桥梁为工程背景,基于最小弯曲能量法对原设计中的预应力钢束进行优化,并利用通用有限元软件对该桥重新建立三维模型,通过与原设计方案模型的位移、应力等数值进行对比和分析,得出较优解,使得结构在受力性能上更加良好,且钢束的合理优化使钢绞线用量降低,从而降低工程结构的造价,同时为桥梁的优化设计提供参考.

Optimization for Prestress of Cantilever in a Continuous Girder Bridge in Zhengzhou City

The continuous girder bridge which crosses the south-to-north water diversion program in Zhengzhou is taken as the engineering background,We used the minimum bending energy method to optimize the prestressed tendons in the preliminary design,then used the optimized result to establish a new finite element model which can compare and analyze the result with the former model,finally get a better result. By doing so,we can make the bridge perform excellently on the mechanical behavior,and reduces project cost because of the reasonable optimization of the prestressed tendons. The optimal result can offer the reference for bridge design.